154 
The powerful interest excited by the investiga- 
tion of analogies may be compared to the gathering 
up a clue or thread, which should indicate the plan 
of an otherwise inextricable labyrinth. The delight 
will doubtless be proportionate to the surmounted 
difficulty. Through the mazes of science, in which 
distinctions and differences present themselves at 
every step, continually interesting, continually en- 
forcing claims on our attention, it is a relief to the 
fatigue of divided attention to feel confident that we 
perceive the continuous connections of objects, the 
clue that guides us to the important end of our ex- 
ertions. Analogies must interest in proportion as 
differences obvious and extensive appear likely to 
embarrass us. 
I have endeavoured amidst a forest of differences 
to point out the marks by which the hand of a se- 
cret Instructor has indicated his most important in- 
formation, the way by which we may trace his foot- 
steps, and continually turn to him, to the end of our 
appointed journey. 
Every column of the differential table, marked 
on the left by the names of classes or grand divi- 
sions, and headed by names of conditions of being, 
or parts of organization, which present analogies 
more or less clearly traceable in each grand division, 
is a portion of an inductive series, the foundation of 
an extended sorites, or syllogistic chain, of which 
this is the common conclusion. 
Innumerable differences, immeasurable in magni- 
tude and in minuteness, display immensity of power, 
